Double glazing unit



Jan. 23, 1951 v. K. HOLLAND DOUBLE GLAZING UNIT Filed Feb. 12, 1946 Virgil h. Holland INVENTOR ATTORNEY Patented Jan. 23, 1951 UNITED STATES PATENT OFFICE DOUBLE GLAZ ING UNIT Virgil K. Holland, Portland, Oreg.

Application February 12, 1946, Serial No. 646,993

1 Claim. 1

The present invention relates to a double glazing unit for windows. It is particularly concerned with a double glazing unit adapted to be mounted in existng window sashes in place of single glazing units for the purpose of providing heat insulation and preventing the accumulation of moisture on the inner side of the window during cold weather.

Various arrangements previously have been proposed for convert ng single glazed windows to double glazed windows. so far as I am aware in all of these prior arrangements the second pane was mounted on the inner side of the window sash more or less independently of the principal pane. As a result, the shoulder of the sash was frequently permanently marred by the means employed for attaching the second pane and, when both panes were broken, twice the time and effort were required to replace them due to the fact that each pane was separately mounted within the sash. 1

A primary object of the present invention is to provide a double glazing unit adapted to be mounted in existing single-pane sashes.

Another object of the invention is to provide an inexpensive double pane glazing unit having an edge thickness comparable to that of a single pane of glass,

A further object of the invention is to provide a frame structure for securing two panes of glass in spaced parallel re ationship and for mounting the para lel panes in a single-pane sash.

Another object of the invent on is to provide a low cost, unitary double glazed structure for converting single-pane windows into doublepane windows.

The above and further objects of the invention will become more apparent from the following description of the invention taken in connection with the accompany ng drawing in which the figure is a partial cross section through one side of a sash equipped with the form of the double glazing unit of the present invention.

While the invention will be specifically described. with reference to the mounting of the double glazing unit in a wooden sash of particular construction, it is to be understood that the glazing'units of the present invention are generally adapted to be mounted in any type of wood or metal window sash designed to receive a single pane.

Referring to the figure of the drawing, numeral I indicates one side of a sash provided the usual shoulder '2 on the inner side thereof forming a bearing surface for a single pane of glass, the

ledge portion 3 being ordinarily of a width sufficient to accommodate the thickness of a single pane of glass and the putty, clamping strip or other means employed for holding the pane against the shoulder.

In the construction shown in the figure, the frame comprises a channel portion 2!, the outer end of which is adapted to seat against shoulder 2 of the sash and the inner portion of which extends between the outer edges of the pair of panes in order to hold them in spaced relationship. The edges of the panes are each mounted in their respective U-shaped portions of the framework provided at the top or inner part of the channel and formed by bending the sheet material adjacent the upper end of the channel portion back upon itself, then transversely out- Wardly and then upwardly in a plane parallel to the panes to form two U-shaped sections for receiving the edges of the panes. U-shaped strips of rubber 23 or other suitable material may be interposed between the edges of the panes and the frame to form a cushion for the glass and also to seal the space between the panes from the exterior.

The space between the parallel panes can be dehydrated or partially evacuated. The construction illustrated in the figure also particularly lends itself to the use of a dehydrating material 22 such as silica or alumina gel, calcium chloride or the like, which can be placed in the channel portion 2! of the lower section of the framework.

It is obvious that the frame can be made in four sections which meet along beveled lines at each corner of the sash structure. In order to provide strong, rigid structures, the four sections can be soldered or otherwise secured together along their points of contact.

From the above description, it would be noted that the present invention provides a unitary double-glass structure adapted to be mounted in a sash originally constructed to receive only a single pane of glass. In each of the modifications, the portion of the unit coming in contact with the shoulder has a thickness substantially equal to that of a single pane of glass, so that after inserting the double glazing unit into the sash, sufiicient room remains on ledge 3 of the sash for the application of putty, or other suitable means for retaining the unit in the sash structure.

Having described the invention in what is considered to be the preferred embodiment thereof, it is desired that it be understood that the specific details shown and described herein are merely illustrative and that this invention may be carried out by other means.

What I claim is:

A dual pane window sheet metal frame member consisting of a relatively deep central U- shaped channel portion, the opposite upper edge portions of said central channel portion being doubled downwardly upon itself a relatively short distance and extending outwardly from the opposite sides of said central channel portion and then extending upwardly so as to define two substantially similar U-shaped channel portions on each of the opposite sides of said central U-shaped channel portion and facing in the same direction as said central channel portion, the internal widths of all of said U-shaped channel portions being substantially the same, the bottom of said central U-shaped portion extending substantially 0 Number below the bottoms of said U-shaped side portions, saidcentral U-shaped channel portion defining a pocket below the bottoms of said U-shaped side portions adapted for receiving a 'quantity of dehydrating material, each of said U-shaped side portions being adapted for cooperatively receiving the edge of a window pane.

VIRGIL K. HOLLAND.

REFERENCES CITED The following references are of record in the file of :this patent:

UNITED STATES PATENTS Name Date Herron Sept. 19, 1933 Fox Nov. 19, 1935 Hadjisky July 4, 1939 

